[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/measurements/thread_times.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
-from measurements import timeline_controller
-from metrics import timeline
+
 from telemetry.core.platform import tracing_category_filter
 from telemetry.page import page_test
 from telemetry.web_perf.metrics import layout
 
+from measurements import timeline_controller
+from metrics import timeline
+
+
 class ThreadTimes(page_test.PageTest):
   def __init__(self, report_silk_details=False):
     super(ThreadTimes, self).__init__()
     self._timeline_controller = None
     self._report_silk_details = report_silk_details
 
   def WillNavigateToPage(self, page, tab):
     self._timeline_controller = timeline_controller.TimelineController()
     if self._report_silk_details:
       # We need the other traces in order to have any details to report.
@@ skipping 14 matching lines @@
     if self._report_silk_details:
       metric.details_to_report = timeline.ReportSilkDetails
     metric.AddResults(self._timeline_controller.model, renderer_thread,
                       self._timeline_controller.smooth_records, results)
     layout_metric = layout.LayoutMetric()
     layout_metric.AddResults(self._timeline_controller.model, renderer_thread,
                              self._timeline_controller.smooth_records, results)
 
   def CleanUpAfterPage(self, _, tab):
     self._timeline_controller.CleanUp(tab)